Strainer-plug for lubricators.



No. 649,779- Patented May l5, I900. T. E. TYLER.

STRAINER PLUG FOR LUBRIGATOBS.

(Applicaticn filed Nov. 20, 1899.)

(No Model.)

2 150.9. Z z jlez THOMAS E. TYLER, OF GLADSTONE, VIRGINIA.

STRAlNER-PLUG FOR LUBRICATORS.

SPECIFICATION forming part of Letters Patent No. 649,779, dated May 15,1900.

Application filed November 20,1899. Serial No. 737,697. (No model.)

To all, whom it may; concern.-

Be it known that I, THOMAS E. TYLER, a citizen of the United States,residing at Gladstone, in the county of Nelson and State of Virginia,have invented a new and useful Strainer-Plug for Lubricators, of whichthe following is a specification.

This invention relates to lubricators, and more particularly to thatclass employed in connection with the cylinders of locomotives; and ithas specific reference to what is known as the oil-plug, with which thefeed-pipe from the lubricator connects and which plug is screwed into athreaded opening in the capplate or cover of the steam-chest.

One object of the invention is to provide a strainer-plug for theoil-plug which will permit the ready flow of the oil therethrough, whichwill not be so susceptible to stoppage as those ordinarily used, and inwhich this strainer-plug may be quickly and easily removed for cleansingand for other purposes without detaching the oil-plug and withoutrecourse to the tools usually required in this operation.

A further object of the invention is to produce a construction ofstrainer-plug in which in the event of breakage of the lubricatorglassthe lubricant may be contributed directly from the oil-can or tallow-potand an even and effective feed will be insured, the lubricant being thendrawn through by the suction of the cylinders when the throttle isclosed.

In the drawings forming a portion of this specification, and in whichsimilar numerals of reference designate like and corresponding parts inthe several views, Figure 1 is a vertical central section taken throughan oil-plug and showing the application of the strainerplug and theattachment of the union carried by the oil-pipe. Fig. 2 is a detailvertical central section of the strainer-plug. Fig. 3 is a section online 3 3 of Fig. 2 looking upwardly.

Referring now to the drawings, 5 represents an oil-plug comprising anexteriorlythreaded and tapered lower portion 6, adapted to engage thethreads in an opening 7 in the cover or cap-plate 8 of the steam-chestor other portion to which the oil is to be supplied. This plug has acentral cylindrical portion 9 and an upper reduced andexteriorly-threaded portion 10, the threads of which are adapted toreceive the threads upon the inner surface of a coupling member 11 ofthe usual construction and rotatably mounted on the lower end of theoil-pipe l2.

Longitudinally and centrally of the plug 5 is a cylindrical bore 13, theupper portion of which is increased in diameter, as shown at 14, and isinteriorly threaded, as shown at 15.

In the upper portion of the bore 13 and lying in both the minor andmajor portions thereof is the strainer-plug 16, comprising an uppermajor portion 17 and a lower minor portion 18, the major portion havingthreads adapted to engage the threads 15 and the minor portion 18fitting snugly within the contracted part of the bore of the plug 5.

In the upper or major portion of the strainer' plug 17 is a cylindricalrecess 19, havinga hemispherical bottom 20,asimilar and smaller recess21 being formed upwardly in the minor portion 18, these depressions orrecesses lying in axial alinement and having a communicating oil-duet 22of very small diameter and of the size usually employed for conductingthe oil from the oil-plug. In addition to this duct 22 are formed ducts24, which are disposed radially downwardly and outwardly from the baseof the recess 19 and open outwardly of the plug at the inner edge of theshoulder formed between the major and minor portions of thestrainer-plug. There are shown four of these ducts 24, which are spacedequally about the periphery of the strainer-plug, and these ductscommunicate at their outer ends with longitudinal grooves or passages25, formed in the outersurface of the minorportion 18 of thestrainer-plug. These passages 25 lead downwardly and through the lowerend of the strainer-plug and communicate with additional oil-ducts 26,formed radially of the minor portion 18 of the strainer-plug in a commonplane and opening into the recess 21. As above mentioned and as shown inthe drawings, this strainer-plug is seated in the upper end of theoil-plug instead of in the lower end, as is usual, and the upper edge ofthe strainer-plug is coneaved, as shown at 27, to correspond with theconcavity oil": the

upper end of the oil-plug, so as to receive and snugly fit the lowercurved end of the oil-pipe 12 under the influence of the couplingmembers 11.

With the above construction when the Inbricator is filled and is openedthe oil passes downwardly through the pipe 12 and into the recess 19,from which it passes outwardly through the several ducts and downwardlythrough the passage 25 into the bore 13 and thence to the part to belubricated, the oil being normally forced under the influence of thesteam-pressure through the lubricator, the plug havinga strainer-likeaction to arrest the impurities and hold them in the recess 19. In thisarrangement the back pressure of steam through the bore 13 and whichnormally tends to retard the passage of the oil is overcome and the flowof oil from the oilplug is constant and plentiful.

Should the lubricator-glass become broken or the lubricator otherwise berendered useless, the oil can be contributed to the oil tube or pipedirectly from the can or pot and will pass into the recess 19, fromwhich it will be drawn under the influence of suction in the cylinderswhen the locomotive is running Without steam. Moreover, it will be seenthat cesses, additional oil-ducts leading from each of the recessesoutwardly through the plug, and oil-passages communicating with thelastnamed ducts and extending through the end of the plug.

3. A strainer-plug for lubricators, adapted to receive and feed thelubricant under pressure, said plug comprising an upper major portionand a narrowed lower portion, a recess in the upper portion, openings inthe recess through the base of the major portion and exteriorly of theminor portion, a recess in the minor portion of lesser diameter thanthat in the major portion, and a passage connecting the recesses. I

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

THOMAS E. TYLER.

\Vitnesses:

GEO. H. GHANALEE, J. Ross OoLHoUN.

